Final Exam Practice Questions

Question 1

Acids:

Answer 1

release protons(H+) when dissolved in water

Question 2

Suzy puts some glucose(C6H12O6) into a container of water. What happens to the glucose?

Answer 2

Each individual glucose molecule is surrounded by water molecules.

Question 3

Proteins:

Answer 3

are a polymer held together by peptide bonds

Question 4

Which of the following do the work in living tissue and cell?

Answer 4

proteins

Question 5

What molecules are required for cells to produce ATP?

Answer 5

oxygen and glucose

Question 6

How many molecules of glucose are in 1 mole?

Answer 6

6.02x10^23

Question 7

Which weighs more?
-One mole of glucose
-one mole of ethanol
-they weight the same
-can’t tell from data given

Answer 7

one mole of glucose

Question 8

Susy has a solution with a concentration of hydrogen ions [H+] = 10^-3. The pH of the solution is

Answer 8

3

Question 9

Susy has a solution with a concentration of hydrogen ions: [H+] = 10^-3. This solution is:

Answer 9

acidic

Question 10

A cell needs to keep sodium (Na+) outside the plasma membrane. Even though the concentration of Na+ is higher outside than inside the cell, the cell keeps pumping Na+ out through an Na+-specific channel. This is an example of:

Answer 10

active membrane potential

Question 11

Which layer of the epidermis is characterized by a high rate of mitosis and the presence of stem cells?

Answer 11

stratum basale

Question 12

Parathyroid hormone (PTH) plays a major role in raising blood calcium (Ca++) levels through a negative feedback loop. Which of the following best describes how PTH works?

Answer 12

As Ca++ levels go down, PTH rises. This raises Ca++ levels.

Question 13

The occipital bone of the skull meets the parietal bone at

Answer 13

the lambdoid suture

Question 14

Hyaluronic acid is secreted by Type B cells of the synovial membrane, and increases the viscosity of synovial fluid. It may be useful for treating:

Answer 14

osteoarthritis

Question 15

Which of the following binds calcium during actin/myosin contraction?

Answer 15

troponin

Question 16

What is the chemical signal that communicates across the synaptic cleft at the neuromuscular junction?

Answer 16

acetylcholine

Question 17

How is an action potential transmitted from the sarcolemma to the sarcoplasmic reticulum?

Answer 17

t tubules

Question 18

Which of the following occurs first in contraction of skeletal muscle:

Answer 18

motor neuron action potential

Question 19

Curare is a plant-derived poison, traditionally used by indigenous people of South America for arrows and blowguns. When injected, curare reversibly prevents acetylcholine from binding to its receptor at the sarcolemma.
This will:

Answer 19

prevent muscle contraction

Question 20

Which of the following muscles elevates the ribs for inspiration/inhalation?

Answer 20

external intercostals

Question 21

How do neurotransmitters exert an effect on the postsynaptic neuron?

Answer 21

-binding a receptor at the postsynaptic neuron
-initiating a graded potential

Question 22

The threshold for initiating an action potential is -55mV. Why?

Answer 22

voltage gated sodium channels open

Question 23

A neuron binds neurotransmitters at three different dendrites that cause graded potentials of +10, -15, and
-20 mV. Will the neuron initiate an action potential?

Answer 23

No

Question 24

Susy is working on a difficult calculus problem. Reading the problem provides afferent visual information. Where is the integration center for her response?

Answer 24

the cerebral cortex

Question 25

CNS damage causing blindness would most likely involve injury to:

Answer 25

the occipital lobe of the cerebrum

Question 26

The the light, which of the following happens in the retina?

Answer 26

-trans-retinal is produced
-action potentials at the ganglion cells